@c01:#1d7aec;
@c02:#3999f0;
@c03:#fff;
@c04:rgba(0,0,0,.06);

.cls() {
    &::after {
        content: '';
        display: block;
        width: 0;
        height: 0;
        clear: both;
    }
}

.touch() {
    cursor: pointer;
    -webkit-user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
    user-select: none;
}